MapProxy

There are some map services that are unreliable because they are unreachable sometimes for days. I think I can solve this problem using MapProxy though.

I started to install mapproxy directly on the host then realized yet again I'd be making a bunch of changes to the host just for this one app.

There is a docker image, see https://github.com/kartoza/docker-mapproxy. I don't know any implementation details, there might be ways to squeeze more performance out.

I mount a local directory at /mapproxy as a volume to hold the config files.